LIGHT-DUTY ROLL-FORMING MACHINE Russian patent published in 2003 - IPC

FIELD: plastic metal working; particularly, production of formed light bar sections. SUBSTANCE: light-duty roll-forming machine consists of chain drive and working stands, in upper and lower back-up chocks of which axes of rolls are installed with specified clearance; in so doing in roughing and intermediate stands axes are made as single-support, while in prefinishing and finishing stands axes are made as double-support; between upper and lower chocks of all stands in axial plane of rolls screws for adjustment of clearance between rolls are installed. On small vertical sides of lower chocks of roughing and intermediate stands fixing strips are fastened, which enters corresponding slots of upper chocks; in so doing first and last stands of mill are constantly full-drive, while all the rest stands can operate with drive, as well as with idle upper rolls, and relationship between values of effective diameter of upper and lower rolls is equal to 2.4 - 2.6, while difference in roll diameters at the beginning and end of their working campaign makes up 6 - 10 %. In so doing screw for adjustment of interroll clearance is made with threads cut in opposite directions at its ends, in-between head is located. EFFECT: reduced manufacturing and operational costs of mill owing to simplification of its design without deterioration of quality of finished sections. 3 cl, 2 dwg